Fix the token types.

test/test_prefix.py

@@ -22,3 +22,17 @@ def test_simple_prefix_splitting(string, tokens):
     assert leaf.type == 'endmarker'
     parsed_tokens = list(leaf._split_prefix())
     assert [t.value for t in parsed_tokens] == tokens
+
+
+@pytest.mark.parametrize(('string', 'types'), [
+    ('# ', ['comment']),
+    ('\r\n', ['newline']),
+    ('\f', ['formfeed']),
+    ('\\\n', ['backslash']),
+])
+def test_prefix_splitting_types(string, types):
+    tree = parso.parse(string)
+    leaf = tree.children[0]
+    assert leaf.type == 'endmarker'
+    parsed_tokens = list(leaf._split_prefix())
+    assert [t.type for t in parsed_tokens] == types